On Friday I went to the local Calumet and played with a 5D3 for a little. And now I'm saving for one, what an amazing camera. Some shots with a 24-105 f/4L IS:

f/4 ISO 25600 (RAW)

ISO 25600 is about equal to my 50D at ISO 3200

hahaha its pretty amazing to see what this camera can do. I still find myself hesitant to boost my ISO up to 1600 with it since that's how I shot with my 20D for the past 7 years hahaha! then I realize a MkIII is in my hands =P

No bites on POTN but my ebay auction is about to end and it will sell. I usually get quick sales on POTN but not this week apparently

I couldn't believe it when I went to list mine on POTN and saw yours, and then two more right after that. All about the same price. The last one listed sold, but yours and the other one are still there. I didn't bother listing mine. It's been on the local CL for a few days with only a trade offer so far. I thought sure it would sell quickly. I still need to list my 50 f1.4 and Roki 35mm f1.4.

Everybody who are micro adjusting their focus are doing it by trial and error?

With Canon and a long lens, you simply set your camera up on a tripod, focus on something 20 or 30-ft away, then switch to Live View, 10X, then refocus (AF both times) to see if the focus changes. If it changes, then you dial in some correction and recheck all over until you get equally good focus by both methods.

Canon uses a different AF method in Live View vs. viewfinder, but I can't remember the details of why this simple test works. (It does, I've tried it). Of course, if neither will focus tack sharp, then you've got a problem.

Anyway, try that technique before buying a calibration devise. Also, remember to do it with your TCs on the lens also. As long as they're Nikon brand, I think the camera, like Canon, will recognize the TC in use and adjust in combination with the lens.

Everybody who are micro adjusting their focus are doing it by trial and error?

I have a line of water bottles on the window sill of my office. They're at an approx 45 degree angle from me. I shoot for the center bottle and see where the focus is sharpest and adjust from there. Very unscientific, but it seems to work for me on the couple lenses I've adjusted.

With Canon and a long lens, you simply set your camera up on a tripod, focus on something 20 or 30-ft away, then switch to Live View, 10X, then refocus (AF both times) to see if the focus changes. If it changes, then you dial in some correction and recheck all over until you get equally good focus by both methods.

Canon uses a different AF method in Live View vs. viewfinder, but I can't remember the details of why this simple test works. (It does, I've tried it). Of course, if neither will focus tack sharp, then you've got a problem.